Rotary compressor



ingested 4 Fea. '52s,' ieas.

UNITED l STATES PATENT oFFicE.

mmr. mamey, or raars, rennen. l 'ROTARY comrnnssoaf Application led July A13, 1925, Serial Y The present invent-ion relates to improvef ments in rotary apparatus such as pumps and compressors of the slidingblade type, and

chiefly as concerns their use for the compres# sion of fluids intended for the supply of mo# trs. The said v.improvements may also be employed to advantage for all uses of the said apparatus.'

-The rotary compressors and like apparatus comprising blades or displacers which are slidablein a rotor are subject to the followingl principal drawbacks as concerns their use for the-high compression of gases:

7 1. 'Their size and weight are considerable for a relatively low output, since it is necessary to limit their speed'in order to reduce the wear of the parts.

v D2. The apparatus is however subject in all cases to wear of 'the cylinder and of the blades, due to friction. A s

'3. The efficiency becomes low as soon as the parts begin to wear, i. e. after a very short period of working so that the'machine, which thus becomes useless, must be at once replaced. Y

My invention has for its object to obviate all of the said drawbacks, and it vrelates to-a` rotary apparatus, for instance a compressor, which is chieily 'characterized by the fact that the blades, which are movable by the effect of centrifuval force, are caused to bear upon the inner rm s of two ball bearin coaxially mounted with respect to the cy inder within annular chambers .provided between the end walls of the casing and sealing plates adapted to secure the proper gas-tightness.

In the appended drawing which shows by way of example a compressor according to my said invention,

Fig. 11's a cross section on the line 1-1 of 2.

Fig. 2 is a lengthwisesection on the line le-a of Fig. 1.

the left 1n Fig. 1, and,

Fig. 3 is an elevational view of the sealing plate adjacent the delivery cover looking to Fi 4.'s an elevational view of the sealing plate adjacent the admission cover looking to the rightin 1.

" In the drawing, 1 is an outer casing which is preferably made of a light metal, and 2 an inner cylindricall sleevewhich is made vof a strongl metal. The movable blades' 3 are` slidably mounted in radial slots ofI a drum '27 carried by the shaft 28 journalled in ball .bearings 29, mounted the covers 4 and 14;

no. 43,120, and "in France July ze, 1924.

actly coaxially with the cylindrical sleeve 2 and are situatedA between the end boxes or covers 4 and 14 and the discs or sealing plates 5 and 15, respectively. The discs 5 and '15, may be made of the same material as the sleeve 2, whilst the end boxes or covers 4 and 14 are preferably'made of the same material as the outer casing 1, in order to reduce the weight. Said boxes are made hollow, the left hand box-4 serving for the delivery and the right hand box 14 for the admission. The casing l has longitudinal channels or grooves 8 9, 21, and the discs 5,15 are suitably apertured at 8a, 9a respectively, said apertures registering with corresponding apertures inthe inner walls of the boxes 4, 14. The apertures 8 of disc 5 register also with the channels 8 of casing 1 while the and4 17. The said bearings are mounte ex apertures 9a of disc15 register with channels y 9', whereby channels 8 communicate Awith the chamber in boxA 4.and channels 8 with the nels 8, 9, 21, m1 ht be interverted partial] or v wholly, thus a ording the possibility o altering the operation of the compressor. 20 denotes longitudinal'hole's provided through the casing 1, plates 5 and 15 and bosses or bridges 26 of the boxes 4 and 14. Bolts 22 extending through said holes are adapted to I hold these parts together tightening nuts 24 and 25 being screwed thereon with the inter-v position of a washer 23.' v

The apparatus'is so designed thatwhen.

the projections 6, 16 oi the blades 3 are in contact withthe-bau bearings 7, 17, there will be no contact betwen the said blades and the s'leeve 2, but a clearance as small as de sired will be left; in this manner I obviate all wear vof the said blades and of thelcylindrical sleeve as -well as all vibration .of

the blades; vthe degree'v of .iuid tightness which is thus-obtainedis in practice superior to what can be had; in -the knownmachines. The volumetric eiiciency is alsohigher, due to the higher speed which may begiven to the rotor and to the provision of the discs or `sealing plates and 15.

If Cepltain Parts Such '8f .the sleevev and; v 'l the substitution of such parts which are com-L paratively inexpensive and the apparatus .neeoasea the constructional forms hereinbefore set forth by way of example, these being susceptible ofpall necessary' modifications with- 3 -out departing from the scope of the invention, as defined in the following claim.

`Having now decribed my invention what' The operation is as follows: I claim .as new and desire to secure by Let-` The gas entering at 11 passes through the Aters Patent is: l a apertures 9* of the inner wall Aof box 1t A rotary gas compressor comprising a cy- 10 and plate 15` into the lchannels 9 and thence lindrical casing, two sealing plates respec-V v .through apertures 9b in the spaces 'limited by tively clamped against the end walls of said the drum Q7, the sleeve 2 and the blades 3. casing, an annular chamber being provided -Due to the rotation of shaft 28 drum 27 and between cach of said end walls and the re# 4 lblades' in the direction of arrow A the gas spective sealing plate, 'coaxially with said 18.. is compressed in said spaces, whose volumev casing, a drum eccentrically journalled in progressively decreases. Assoon as a'blade bearings of said end walls, ball-bearings're 3 clears the rst aperture 8b the compressed spectively mounted within said annular gas escapes into lthe channels 8 and thence. chambers, radial slots in saiddi'um, blades I v rough apertures 8", into the chamber of' slidably mounted in said slots and having il! the hollow head 4. 10 denotes `the delivery inner lateral projectionsadapted to bear s branch. The longitudinal partitions '12 and against the inner rings of said ball bearings 11i-between the'cha-nnels, 8, 9, 21,"are prefrespectively and inlet and exhaust ports erably castinone with the outer casing .1. opening into the space between theii'mer Should coolin be necessa incase of a surface of said casing and the outer aeje 25 high degree o compression eing desired, a of said drum. water jacket can be readily provided around In testimony whereof I the cylinder'for this purpose. nameto this specification. l Y Obviousl the 'nvention is not limited-to BAPHAU'MALBY.

dition at a small cost.

Vl can thus be restored to a practically new vconhave my 

